Secret origins, by far. Birthright had a good beginning and end, but the bulk of everything in between sucked. Secret origins took all the best aspects of the various origins and put them together into a cohesive story. It may have seemed redundant at times because of that, but it was done rather well.

Finally! The first member to agree with me. I loved Secret Origins. The only thing I'd complain about is the length in comparison to Birthright. I wasn't SUPER wowed by Birthright. But didn't hate it.